Queen Elizabeth II’s death puts into action a detailed plan called "Operation London Bridge," as well as another plan called "Operation Unicorn." ...

Queen Elizabeth II’s death puts into action a detailed plan called "Operation London Bridge," as well as another plan called "Operation Unicorn." ...

Operation London Bridge is the code name for what happens now after the death of Queen Elizabeth II. It's also Operation Unicorn because she died in Scotland.

Operation London Bridge is the code name for what happens now after the death of Queen Elizabeth II. It's also Operation Unicorn because she died in Scotland.

Operation London Bridge is the code name for what happens now after the death of Queen Elizabeth II. It's also Operation Unicorn because she died in Scotland.

Operation London Bridge is the code name for what happens now after the death of Queen Elizabeth II. It's also Operation Unicorn because she died in Scotland.

FILE - In this Saturday, June 17, 2017 file photo, members of Britain's Royal family from left, Camilla, the Duchess of Cornwall, Prince Charles, Princess Eugenie, Queen Elizabeth II, background ...